Two intruders got past perimeter security at Denver International Airport in the last year.
The airport saw one breach of its perimeter security in 2015 when someone drove through a vehicle gate, and another in January when a person climbed a fence and was arrested .
DIA is the largest airport in the United States by land size at 34,000 acres, 53 square miles.
Last year, the Associated Press reported that at least eight people had breached the perimeter fence at Denver International Airport from 2004-2015. The AP found that most of the breaches at DIA involved people climbing over the fences to take a short cut, either to get home, to work or to the terminal.
Airport spokesman Heath Montgomery says the airport recently invested in technology to monitor its three dozen miles of fencing.
The Associated Press compiled the information as part of its investigation into perimeter breaches at major U.S. airports. Nationally, breaches remain as frequent as ever, and are happening on average every 10 days at one of the 31 airports AP studied.